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Choose from four options: ■ TV mapping ■ TV terrain plot ■ TV technical ■ Radio

Freeview reception at SW7 1BW

For reliable and stable Freeview reception, you need an unobstructed path between the TV aerial on your roof and the digital TV transmitter. The map below shows the transmitters predicted to provide a signal at this location.

You can click on any transmitter symbol to show the coverage area as a green overlay on the map. Double click on a transmitter symbol to go to the transmitter information page.

You can also view the ten closest potential '4G-at-800' mobile phone masts within 1.5km of the selected location - these masts may be used for 4G-at-800 mobile broadband services from 2013-2015.

map is loading, please wait...

There are 104 mobile phone masts within 1.5km of SW71BW (page shows closest 10)

What do the map symbols mean?

EE, Multiple operators, O₂, 3, Vodafone, location on line-of-sight, Selected location, Freeview transmitter, Freeview light transmitter, Engineering/fault today.

These icons show the potential locations for 5G-at-700MHz services that may interfere with Freeview reception. For actual mobile device reception prediction (at 800-960MHz and 1710-2170MHz) see these phone operator's mapping sites: Three O2 EE VM

Predicted Freeview channel list

1	BBC One (SD)	Crystal Palace London	PSB1
2	BBC Two	Crystal Palace London	PSB1
3	ITV 1 (SD)	Crystal Palace London	PSB2
4	Channel 4 (SD)	Crystal Palace London	PSB2
5	Channel 5	Crystal Palace London	PSB2

6	ITV 2	Crystal Palace London	PSB2
8	LONDON LIVE	Crystal Palace	LW
9	BBC Four	Crystal Palace London	PSB1
10	ITV3	Crystal Palace London	PSB2
11	Sky Mix	Crystal Palace	COM5

12	Quest	Crystal Palace	COM6
13	E4	Crystal Palace London	PSB2
14	Film4	Crystal Palace London	PSB2
15	Channel 4 +1	Crystal Palace London	PSB2
17	Really	Crystal Palace	COM5

18	More4	Crystal Palace London	PSB2
19	U&Dave	Crystal Palace	COM5
20	U&Drama	Crystal Palace	COM4
21	5USA	Crystal Palace	COM4
23	BBC Three	Crystal Palace London	PSB1

25	U&W	Crystal Palace	COM6
26	ITV4	Crystal Palace London	PSB2
27	U&Yesterday	Crystal Palace	COM6
28	ITVBe	Crystal Palace London	PSB2
29	ITV2 +1	Crystal Palace	COM4

30	E4 +1	Crystal Palace London	PSB2
31	E4 Extra	Crystal Palace	COM5
32	5STAR	Crystal Palace	COM4
33	5Action	Crystal Palace	COM4
34	GREAT! movies	Crystal Palace	COM6

35	ITV1 +1	Crystal Palace London	PSB2
36	Sky Arts	Crystal Palace	COM5
38	Channel 5 +1	Crystal Palace	COM4
39	DMAX	Crystal Palace	COM6
40	Quest Red	Crystal Palace	COM5

41	Legend	Crystal Palace	COM4
42	GREAT! action	Crystal Palace	COM4
43	Food Network	Crystal Palace	COM5
44	HGTV	Crystal Palace	COM6
46	5SELECT	Crystal Palace	PSB3

47	Film4 +1	Crystal Palace	COM5
48	Challenge	Crystal Palace	COM5
49	4seven	Crystal Palace	COM5
52	GREAT! christmas	Crystal Palace	COM6
56	That's TV (UK)	Crystal Palace	COM6

57	U&Dave ja vu	Crystal Palace	COM4
58	ITV3 +1	Crystal Palace	COM4
59	ITV4 +1	Crystal Palace	COM4
60	U&Drama +1	Crystal Palace	COM5
63	GREAT! romance mix	Crystal Palace	COM6

64	Blaze	Crystal Palace	COM4
65	That's TV 2	Crystal Palace	COM5
67	TRUE CRIME	Crystal Palace	COM4
68	TRUE CRIME XTRA	Crystal Palace	COM4
70	Quest +1	Crystal Palace	COM5

71	That’s 60s	Crystal Palace London	PSB2
73	HobbyMaker	Crystal Palace	COM6
74	&UYesterday +1	Crystal Palace	COM5
75	That's 90s	Crystal Palace	COM6
76	That's TV 2 MCR	Crystal Palace	COM5

81	Blaze +1	Crystal Palace	COM4
82	Talking Pictures TV	Crystal Palace	COM6
83	Together TV	Crystal Palace	COM4
84	PBS America	Crystal Palace	COM6
91	WildEarth	Crystal Palace	COM4

93	ITVBe +1	Crystal Palace	COM4
101	BBC One HD	Crystal Palace	PSB3
102	BBC Two HD	Crystal Palace	PSB3
103	STV HD	Crystal Palace	PSB3
103	UTV HD	Crystal Palace	PSB3

103	ITV 1 HD	Crystal Palace	PSB3
104	Channel 4 HD	Crystal Palace	PSB3
105	Channel 5 HD	Crystal Palace	PSB3
106	BBC Four HD	Crystal Palace	PSB3
107	BBC Three HD	Crystal Palace	PSB3

108	BBC Scotland HD	Crystal Palace	PSB3
110	Channel 4 HD (Wales)	Crystal Palace	PSB3
201	CBBC	Crystal Palace London	PSB1
202	CBeebies	Crystal Palace London	PSB1
204	CBBC HD	Crystal Palace	PSB3

205	CBeebies HD	Crystal Palace	PSB3
209	Ketchup TV	Crystal Palace	COM4
210	Ketchup Too	Crystal Palace	COM4
211	YAAAS!	Crystal Palace	COM4
231	BBC News	Crystal Palace London	PSB1

232	BBC Parliament	Crystal Palace London	PSB1
233	Sky News	Crystal Palace	COM5
235	Al Jazeera Eng	Crystal Palace	COM6
251	Al Jazeera English	Crystal Palace	COM4
255	FRANCE 24 (in English)	Crystal Palace	COM4

265	Rok Sky +1	Crystal Palace	COM4

Advanced options

Show good and blocked paths from SW7 1BW for aerial height of ...

10m20m (Angel of the North)25m30m40m56m (Hyde Park Flats, Sheffield)62m (Monument)90m (Royal Liver Building, Liverpool)107m (Meridian Quay Tower, Swansea)115m (Bridgewater Place, Leeds)127m (Glasgow Tower)143m (Guy's Hospital)158m (Blackpool Tower)170m (Spinnaker Tower, Portsmouth)180m (The Gherkin/BT Tower) 193m (Tower 42)235m (Canary Wharf)310m (The Shard)(default view)

Comments

Tuesday, 2 July 2013

ian
1:48 PM
Hove

Ok, but say a is transmitting at 61dBm, on a spectrum analiser would this (without use of an amp) ever show above 61dB?

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ian's 1 post GB flag

ian's: I's Freeview map I's terrain plot I's frequency data I's Freeview Detailed Coverage

Briantist

_{sentiment_very_satisfied}Owner

2:42 PM

ian: "61dB" is a ratio, not a measure of .

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Briantist's 38,915 posts GB flag

Thursday, 4 July 2013

Keith
9:36 AM
Chinnor

jb38: Guess what.

We routed the down straight into the Sony TV. Perfect .

Then connected it via the splitter/amp. Broken picture...

New amp and everything is working fine, strength indicator on the sony is high.

Not sure why he didn't figure out the amp was the problem first time round, however it all works now, thanks.

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Keith's 8 posts GB flag

Keith's: K's Freeview map K's terrain plot K's frequency data K's Freeview Detailed Coverage

jb38

_{sentiment_very_satisfied}Platinum

4:48 PM

Keith: Thanks for your update and pleased to hear that the problem is finally solved, but though as far as the issue concerning the splitter / is concerned this "was" the device that had initially came under suspicion as being the reason for your problem, as in my original reply (@ 7.14pm / 29th) to your posting I had queried if this device had been checked out by the installer, you having confirmed in your reply (@ 01.37pm / 30th) that it had been, and adding words to the effect that your own suspicions were also with this device and why you had purchased / then returned another booster which when installed as a replacement had not made any difference to the situation.

Although everything appears to be OK now and I suppose that's all that really matters, but from my point of view (as an engineer) there is still an iffy element about the exact reason for your problem, because "if" the original had been OK then the problem was being caused by the booster / splitter, but as the replacement booster / splitter referred to was found not to have made any difference to the situation then the reason for the problem automatically reverted to the cable being faulty, as I would find an aerials coax downlead, as well as the booster / splitter attached to the end of failing at the same time a little too coincidental to be factual, my suspicions being that the aerial installers words vs actual actions are not necessarily running in parallel lines and something had been overlooked that he cared not to mention.

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jb38's 7,179 posts GB flag

Keith
5:18 PM
Chinnor

jb38: I wonder if it's possible to damage an /splitter by e.g. shorting its . Since at some time it did work, and changing it made no difference (this was about 3 years ago).

Like you I am a bit mystified as to why he didn't identify the problem as being with the splitter. He claimed to me originally that the signal strength was weak but the booster was doing its job. It was after that he decided to move the and made matters worse.

Still it works now and I can go and watch the tennis!

- Keith

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Keith's 8 posts GB flag

Keith's: K's Freeview map K's terrain plot K's frequency data K's Freeview Detailed Coverage

jb38

_{sentiment_very_satisfied}Platinum

6:27 PM

Keith: The only type of / booster than can be damaged by causing a short circuit across any of their sockets (whether input or ) are the types that provide to a head amplifier, the 5 / 12 volts DC being on the aerial input socket, the power travelling "up" the downlead and into the mast head amplifier located on either the aerial itself, or alternatively a small box mounted on the mast pole.

My personal suspicion is that the problem was purely being caused by the old downlead , and if indeed the aerial installer had said what you have reported i.e: signal strength was weak but booster was doing its job, then this is an admission that the booster must have been working because if it wasnt the weak signal would have vanished as there is no in-between states, they either work or they dont!

If the aerial installer left the old booster / splitter with you maybe you could let me know the model number printed on its ID label, as this would enable me to establish whether or not your system uses a mast head amp.

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jb38's 7,179 posts GB flag

Friday, 5 July 2013

Keith
10:13 AM
Chinnor

jb38: I ripped open the old . No real info on it but "Electro-replacement Ltd Model SIG 4". The input is capacitively coupled to a 2 stage transistor amp whose appears to be inductively coupled to the 4 outputs. No amp.

One point - the 'old download ' you mention is still in place. I wonder if there was just a faulty connection (he did undo the coax connectors to check them).

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Keith's 8 posts GB flag

Keith's: K's Freeview map K's terrain plot K's frequency data K's Freeview Detailed Coverage

jb38

_{sentiment_very_satisfied}Platinum

9:05 PM

Keith: With regards to the old / splitter, if the rear of its input socket is coupled onto the PCB via a capacitor with no DC bypass circuit in place then this is a positive indication that your system is "not" fitted with a head amplifier powered via the splitters aerial input socket.

As far as the reason for the problem is concerned, I do have to admit that when I referred to you having purchased then returned another booster splitter I was not aware that you were referring to 3 years ago, me having assumed that this had been done prior to making your initial posting, but though if the aerial installer you called in "since" making your recent posting had given the OK to the booster then it had to be the / or connections at fault.

But though the fact still remains that if the aerial installer had followed fault finding procedures then the reason
for your problem should really have been diagnosed within the first 15 minutes of his arrival, that is "if" on arrival he was kitted out with a proper meter thus removing the element of guesswork from the equation.

By the way the only device I know listed as " SIG 4" is made by the company in the undermentioned link, this device having 16dB on each of its outputs.

PS: With regards to zero signal until the booster / splitter was changed, pity you ripped it apart because I would have liked you to have tested it out, as I still find it strange for it to be OK on the first visit then suddenly be defective on the next, although I would prefer to keep my ideas about that to myself.

http://www.apt-erlltd.co.….pdf

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jb38's 7,179 posts GB flag

Saturday, 6 July 2013

Keith
11:31 AM
Chinnor

jb38: On his first visit, the man definitely tested the with some handheld instrument - I did not get a good look at it but it showed several vertical bars on a LCD screen. He told me that the signal strength was weak at the TV, weak at the of the , weaker at the input of the booster and then got his ladder out to measure it at the aerial itself. It was then he claimed it was weak there and the aerial needed repositioning. After that he told me the signal strength was 'good' at the TV, although it could not get any ! This was when he claimed the TV might be at fault...

Something doesn't add up but I guess I'll never know what, unless the problem reappears.

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Keith's 8 posts GB flag

Keith's: K's Freeview map K's terrain plot K's frequency data K's Freeview Detailed Coverage

jb38

_{sentiment_very_satisfied}Platinum

4:56 PM

Keith: Thanks for the latest on the issue, however I stick by my previous suspicions with regards to the installer having overlooked the real cause of the problem, but as a face saving measure having covered this up by "arranging" another reason for your difficulty as something does not ring true about what you have been led to believe.

The only thing I will fully agree with the installer about is by his action of moving the aerial, however as your problem has now been rectified I suppose the whole issue to be relegated into the class of being one of those "open verdict" cases as to the exact cause of the problem, albeit I still suspect that the downlead or connections at each end of were really responsible.

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jb38's 7,179 posts GB flag

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Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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